空間桁架結構的非線性追蹤分析理論
劉小強 劉 杰 梁游鈞 李慶元
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劉小強 劉 杰 梁游鈞 李慶元
（深圳南山建設監(jiān)理公司 深圳 518052）[提要] 本文提出了空間桁架結構基于Euler坐標描述的非線性分析方法。幾何非線性分析包括考慮結構發(fā)生桿端大側移、桿端大轉(zhuǎn)角下的平衡條件，導出了桿件切線剛度矩陣的顯式。材料非線性包括考慮壓桿彈塑性失穩(wěn)前和失穩(wěn)后的荷載一位移路徑。運用本文模型可追蹤空間桁架結構外力與位移關系的全過程。
[關鍵詞] 空間桁架 幾何非線性 材料非線性Nonlinear analysis theory of spatial truss structures under Euler coordinate system is presented. Geometrical nonlinearity covers large member end translation and rotation, explicit member tangent
stiffness matrix is derived, thrust dispacement path before and after the maximum load carrying capacity is imbodied. The whole range load displacement corelation can be traced by the analysis model.
Keywords: space trusses; geometrical nonlinearity; material nonlinearity
